Governor.



No. 840,340. PATENTED JAN. 1', 1907.

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GOVERNOR.

APPLICATION rmm MAR. 22, 1906.

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PATENTED JAN. 1, 1907.

R. L. JOHNSON.

GOVERNOR. I APPLICATION FILED I AB. 22 1906.

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ROBERT L. JOHNSON, E MURFREESBORO, TENNESSEE.

GOVERNOR.

Specification of Letters Patent.

Patented Jan. 1, 1907.

Application filed March 22, 1906. Serial No. 307,432.

T0 00% whom it may concern: Be it known that 1, ROBERT L. JOHNSON, a citizen of the United States, residing at Murfreesboro, in the county of Rutherford, State of Tennessee, have invented certain. new and useful Improvements in Governors; and I do hereby declare the following to be a full, clear, and exact description of the invention,

. such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to governors for steam-engines, and has for its object to provide a governor which may be so connected with the valve-rod of a reciprocatory engine that it will regulate the speed of the engine by shortening the stroke of the said rod when the speed of the engine increases.

A further object of the invention is to rovide a simple and efficient device of this 0 aracter which may be applied to any of the. ordinary forms of centrifugal governors on the market.

In the accompanying drawings, Figure l is an elevation of an engine, showing my invention in position thereon. Fig. 2 is a detail front elevation, partly in section, ofthe governor removed from the engine; and Figs. 3 and 4 are detail views of the oscillating arm and the fixed guide-standard.

Referring more specifically to the drawings, the numeral 5 denotes the engine-cylinder, 6 the steam-chest of the engine, and 7 the valve-rod for the sliding valveof the engme.

.The numeral 8 denotes the engine-shaft, and 9 an eccentric mounted thereon. Engaged with the eccentric 9 is an eccentricstrap 10, and connected with the latter is a rod 11. Q

Mounted upon the engine-cylinder 5 is the governor for the engine. The governor proper is of the ordinary construction and includes the usual frame 12, centrifugal balls 13, and stem 14, the centrifugal balls being rotated by'means of bevel-gears 15 in the usual manner.

Pivotally secured to the lower end of the governor-stem 14 is an oscillatingarm 15, which is slotted vertically at 16 and which has its lower end turne'd upwardly and back upon itself at 17. The back-turned portion of the arm 15 is perforated at 18 adjacent its extreme endfor a purpose to be hereinafter described. Y

The base portion of the frame 12 of the governor is slotted at 19, and engaged through the said slot is the threaded lower end 20 of a standard 21. Engaged upon the threaded portion of the standard are nuts 22 and 23, which abut the upper and lower faces of the said base portion of the frame 12, res ectively. The upper portion of the stan ard 21 is slotted at 24.

The outer end of the rod 11 is pivoted to the oscillating arm 15 by means of a pivotpin 25, which is carried by the said rod and engaged through the perforation 18.

The valve-rod 7 is provided adjacent its end with a pin 26, which works in the slot 16 in the oscillating arm 15, and the extreme end portion of the said rod 7 is engaged through the slot 24 in the standard 21.

From the foregoing it will be seen that as the speed of the engine increases the gov ernor-stem 14 moves upwardly, and hence lowers the oscillating arm 15. As the pin 26 approaches the pivotal point of the oscillating arm 15 the stroke of the valve-rod 7 is shortened and the speed of the engine reduced.

What is claimed is 1. In a device of the character described, the combination with a reciprocatory valverod, a governor-stem and an eccentric-rod, of an arm pivoted to the governor-stem and having its lower end bent back upon itself, the end of the eccentric-rod being pivoted to said back-turned portion, and a pin carried by said valve-rod and engaged in a slot in said arm.

2. In a device of the class described, the combination with a valve-rod, a governorstem, and an eccentric-rod, of a slotted arm pivoted to the governor-stem, the lower end portion of said arm being bent back upon itself in spaced relation to its body portion, the end of the eccentric-rod being pivoted to the backbent portion of the arm and the valve-rod being received between the spaced portions thus formed, and a pin carried by the valve-rod and engaged in the slot in the arm.

In testimony whereof I affix my signature in presence of two witnesses.

ROBERT L. JOHNSON.

Witnesses:

R. H. JOHNSON, HENRY JOHNSON. 

